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Popular The tools people reach for most
  1. 1Odds ConverterAmerican
  2. 2Kelly Criterion CalculatorBet Sizing
  3. 3Expected Value CalculatorSports
  4. 4Parlay CalculatorParlay
  5. 5Arbitrage CalculatorArbitrage
  6. 6Hedge Bet CalculatorHedge

All 125 tools

125 shown
SIMULATION
Popular

Martingale Simulator

Simulate thousands of martingale progression sessions against table limits, bankroll constraints, and house edge.

  • Simulation
  • Roulette
  • Crash
FIBONACCI

Betting Strategy Lab

Run Monte Carlo sims of Fibonacci, D'Alembert, Labouchere, Paroli, 1-3-2-6 and Oscar's Grind side by side on the same bankroll and edge.

  • Fibonacci
  • D'Alembert
  • Paroli
PROGRESSION

Strategy Progression Calculators

Step through Martingale, Fibonacci, D'Alembert, Labouchere, Paroli and Oscar's Grind bet by bet and see where each takes your stake.

  • Progression
  • Martingale
  • Fibonacci
SESSION

Session Outcome Simulator

Enter house edge, bet size and session length to see the probability you finish the night ahead.

  • Session
  • Probability
  • Simulation
KELLY

Staking Plan Comparator

Compare flat, percentage, Kelly, Fibonacci and square-root staking under Monte Carlo and see which plan fits your edge and risk tolerance.

  • Kelly
  • Fibonacci
  • Monte Carlo
GROWTH

Bankroll Growth Visualizer

Simulate bankroll growth across strategies and read the fan chart: percentile bands, not one lucky run.

  • Growth
  • Compound
  • Visualization
SESSION

Session Planner

Plan casino sessions with realistic expectations. Set win goals and stop-losses, run 10K Monte Carlo simulations, see probability of hitting targets.

  • Session
  • Monte Carlo
  • Win Goal
BUST

Bust Calculator & Simulator

Monte Carlo bust probability and bonus clearing over thousands of runs, with Kelly sizing, risk of ruin and the outcome distribution.

  • Bust
  • Risk of Ruin
  • Kelly
DICE

Bust Probability Calculator

The probability you go bust from your bankroll, bet size and house edge, across session lengths.

  • Dice
  • Crash
  • Roulette
SPORTS
Popular

Expected Value Calculator

Enter your win probability and the offered odds to see the expected value of the bet, positive or negative.

  • Sports
  • Casino
  • Poker
BET SIZING
Popular

Kelly Criterion Calculator

The Kelly bet size for your edge and odds, with fractional Kelly for when full Kelly is too much variance.

  • Bet Sizing
  • Bankroll
  • Edge
BANKROLL

Bankroll Management

Enter bet size, RTP and rounds per hour to see how long your bankroll lasts, the unit size that fits it, and when to walk.

  • Bankroll
  • Sessions
  • Risk
RECOVERY

Drawdown Recovery Calculator

After losing X%, how much do you need to win to recover? Lose 50% and you need 100% gain. Visualize the asymmetry of losses vs. gains.

  • Recovery
  • Loss
  • Drawdown
STREAKS

Streak Probability Calculator

The probability of a losing (or winning) streak of any length at your win rate and sample size.

  • Streaks
  • Variance
  • Probability
IMPLIED

Implied Probability Calculator

Convert odds into true implied probabilities. Remove the overround from multi-outcome markets and find +EV bets where your estimate exceeds the line.

  • Implied
  • Probability
  • Overround
FALLACY

Gambler's Fallacy Demo

Flip coins and spin wheels with live statistics and watch past results fail to move the next one.

  • Fallacy
  • Interactive
  • Education
AMERICAN
Popular

Odds Converter

Convert between American, Decimal, Fractional odds and Implied Probability instantly. The most essential tool for any sports bettor.

  • American
  • Decimal
  • Fractional
PARLAY
Popular

Parlay Calculator

Build multi-leg parlays and see total odds, combined implied probability, and exact payout. Input up to 15 legs in any odds format.

  • Parlay
  • Accumulator
  • Multi-Leg
PARLAY

Parlay Probability Visualizer

A chart of parlay win probability collapsing as legs are added, and why the book loves every leg you add.

  • Parlay
  • Probability
  • Visualization
ARBITRAGE
Popular

Arbitrage Calculator

Find guaranteed profit across 2+ sportsbooks. Input odds from different books and get the exact stake split for risk-free returns.

  • Arbitrage
  • Sure Bet
  • Risk-Free
HEDGE
Popular

Hedge Bet Calculator

Lock in profit on an open bet by calculating the optimal opposite-side stake. Essential when your parlay is 1 leg away from hitting.

  • Hedge
  • Lock Profit
  • Parlay
NO-VIG

No-Vig / Fair Odds

Strip the bookmaker margin to reveal true probability. Input both sides of a line and see the fair odds without juice.

  • No-Vig
  • Fair Odds
  • Juice
DUTCHING

Dutching Calculator

Split your stake across multiple selections for equal profit regardless of winner. Popular for horse racing and soccer markets.

  • Dutching
  • Multi-Select
  • Racing
FREE BET

Free Bet Converter

Convert sportsbook free bets and bonus bets into real cash. Calculate the optimal hedge to extract 70-80% of face value.

  • Free Bet
  • Bonus
  • Conversion
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